EP1375925B1 - Centrifugal blower with cooling fin - Google Patents
Centrifugal blower with cooling fin Download PDFInfo
- Publication number
- EP1375925B1 EP1375925B1 EP03253621A EP03253621A EP1375925B1 EP 1375925 B1 EP1375925 B1 EP 1375925B1 EP 03253621 A EP03253621 A EP 03253621A EP 03253621 A EP03253621 A EP 03253621A EP 1375925 B1 EP1375925 B1 EP 1375925B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling fins
- centrifugal blower
- straightening
- blower
- scroll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5813—Cooling the control unit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
- H05K7/20918—Forced ventilation, e.g. on heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
Definitions
- the present invention relates to a centrifugal blower having a cooling fin for cooling a control device in a scroll.
- FIG. 6 shows this type of a known centrifugal blower.
- the centrifugal blower has a multivane impeller 2 in a curved scroll 1.
- air is sucked into the impeller 2, flows along the scroll 1, and blown out through a blow port 3.
- Many cooling fins 4 are provided in a protruding manner near the blow port 3 in the scroll 1, along a flow direction of blown air.
- An unshown transistor for controlling a motor is cooled via the cooling fins 4.
- centrifugal blower In order to solve the problems, a centrifugal blower is proposed in Japanese Patent Laid-Open No. 2000-145700.
- outer cooling fins located on both sides among cooling fins have partitions extending from downstream ends of the outer cooling fins toward a blow port.
- the centrifugal blower described in Japanese Patent Laid-Open No. 2000-145700 effectively attenuates the low frequency sounds as described above, but attenuates few high frequency sounds, and thus insufficiently attenuates noise of the blower.
- an object of the invention is to provide a centrifugal blower that can reliably attenuate high frequency sounds in noise of the blower.
- the invention provides a centrifugal blower including: a scroll that accommodates an impeller; and a plurality of cooling fins for cooling a control device that extend near a blow port in the scroll and along an air flow direction, and are provided side by side at intervals in a direction orthogonal to the air flow direction, wherein the centrifugal blower further includes: first straightening vanes that correspond to outer cooling fins located at both ends among the cooling fins, and extend from downstream ends of the outer cooling fins toward the blow port; and a second straightening vane that corresponds to at least one of inner cooling fins located between the outer cooling fins, and extends from a downstream end of an inner cooling fin toward the blow port.
- the impeller when the impeller is rotated, blown air is sheared by the cooling fins, and blown air flows between the cooling fins. Subsequently, the blown air flows between the first straightening vanes and the second straightening vane, and is then blown out from the blow port.
- the invention achieves an increased straightening effect (a prevention effect of a turbulent flow) on a downstream side of the cooling fins, thus preventing amplification of high frequency sounds resulting from the turbulent flow that occurs on the downstream side of the cooling fins, compared to the blower described in Japanese Patent Laid-Open No. 2000-145700.
- the turbulent flow has no influence on the blown air passing through the other adjacent passage.
- the invention also achieves reliable attenuation of noise.
- FIGS. 1 to 5 show an embodiment of a centrifugal blower according to the invention.
- a multivane blower hereinafter referred to as a blower
- Parts having like configurations as in a conventional blower in FIGS. 6 and 7 will be described using like reference numerals.
- the blower 10 has a scroll 1, and has an impeller 2 with many forward curved vanes 2a therein.
- a suction port 5 is formed on a side plate 1a of the scroll 1, and air is sucked into the impeller 2 through the suction port 5.
- a blow port 3 is formed on a blow side of the scroll 1, and the air sucked into the impeller 2 is guided along an inner peripheral surface of the scroll 1, and blown out from the blow port 3.
- An electric motor 6 is provided as a rotation drive source of the impeller 2 as shown in FIGS. 2 and 3.
- a control device 7 (such as a transistor) of the electric motor 6 is provided near the blow port 3 in the scroll 1.
- Each cooling fin 4 is made of an aluminum material, and extends along a flow direction of blown air flowing in the scroll 1.
- the cooling fins 4 are provided side by side at intervals in a direction orthogonal to the flow direction of the blown air, allowing the blown air to flow between the cooling fins 4 adjacent to each other.
- blower 10 is similar to that of the conventional blower, and a feature of the blower 10 according to the invention resides in providing first straightening vanes 8a and second straightening vanes 8b between the cooling fins 4 and the blow port 3.
- the first straightening vanes 8a correspond to outer cooling fins 4a located at both ends among the cooling fins 4, and extend from downstream ends of the outer cooling fins 4a toward the blow port 3.
- the second straightening vanes 8b correspond to inner cooling fins 4b located between the outer cooling fins 4a, and extend from downstream ends of the inner cooling fins 4b toward the blow port 3.
- the straightening vanes 8a, 8b are made of resin and integrally formed with the scroll 1.
- the straightening vanes 8a, 8b have the same height and width as the cooling fins 4, and extend in the same direction as the cooling fins 4 as shown in FIG. 5 and FIG. 6.
- a second straightening vane 8b is arranged at every other inner cooling fin 4b among five inner cooling fins 4b, and this allows the blown air having passed between the cooling fins 4 to be divided into three parts by the straightening vanes 8a, 8b, and blown to the blow port 3.
- the blown air having passed through the cooling fins 4 is divided by the straightening vanes 8a, 8b.
- the turbulent flow has no influence on the air passing through the other adjacent passage, preventing amplification of noise resulting from the turbulent flow.
- the straightening vanes 8a, 8b have the same height and width as the cooling fins 4, and extend in the same direction as the cooling fins 4, thus there is no bump or flection between the cooling fins 4 and the straightening vanes 8a, 8b. Therefore, the blown air having passed through the cooling fins 4 smoothly flows between the straightening vanes 8a, 8b.
- FIG. 5 comparing the conventional blower having no straightening vanes 8a, 8b (the blower in FIGS. 6 and 7) with the blower 10 according to the invention having the straightening vanes 8a, 8b.
- the ordinate axis shows sound pressure
- the abscissa axis shows frequency.
- the dotted parts in FIG. 5 show the amount of noise attenuation of the blower 10 according to the embodiment.
- noise is attenuated in most of bands from 500 Hz to 5 kHz in the blower 10, and especially, the amount of attenuation of high frequency sounds of 2 kHz and higher is extremely large.
- the straightening vanes 8a, 8b are made of resin and integrally formed with the scroll 1, thus the number of assembly parts is reduced when the blower 10 is produced.
- the straightening vane 8 is provided at every other cooling fin 4 in this embodiment, but when the straightening vanes 8a, 8b are arranged correspondingly to all of the cooling fins 4, a straightening effect of the blown air is further increased, and the noise is further attenuated.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- The present invention relates to a centrifugal blower having a cooling fin for cooling a control device in a scroll.
- FIG. 6 shows this type of a known centrifugal blower. The centrifugal blower has a
multivane impeller 2 in a curved scroll 1. When theimpeller 2 is driven by an unshown motor, air is sucked into theimpeller 2, flows along the scroll 1, and blown out through ablow port 3.Many cooling fins 4 are provided in a protruding manner near theblow port 3 in the scroll 1, along a flow direction of blown air. An unshown transistor for controlling a motor is cooled via the cooling fins 4. - In this centrifugal blower, however, the blown air is sheared by the
cooling fins 4 as shown in FIG. 7 (the arrows show airflow), and a turbulent flow including a Karman vortex occurs on a downstream side of thecooling fins 4. This causes problems that noise is generated in the scroll 1, and the blown air having passed through the cooling fins 4 flows back, and are sucked into theimpeller 2 again. - In order to solve the problems, a centrifugal blower is proposed in Japanese Patent Laid-Open No. 2000-145700. In the centrifugal blower, outer cooling fins located on both sides among cooling fins have partitions extending from downstream ends of the outer cooling fins toward a blow port.
- In the centrifugal blower, air flows between the cooling fins to form a turbulent flow on a downstream side of the cooling fins, but a flow direction of the blown air is controlled by the partitions to prevent backflow of the air toward an impeller. Thus, low frequency sounds (around 100 Hz) arising from the backflow of the blown air are not amplified.
- The centrifugal blower described in Japanese Patent Laid-Open No. 2000-145700 effectively attenuates the low frequency sounds as described above, but attenuates few high frequency sounds, and thus insufficiently attenuates noise of the blower.
- In view of the above described problems, an object of the invention is to provide a centrifugal blower that can reliably attenuate high frequency sounds in noise of the blower.
- The invention provides a centrifugal blower including: a scroll that accommodates an impeller; and a plurality of cooling fins for cooling a control device that extend near a blow port in the scroll and along an air flow direction, and are provided side by side at intervals in a direction orthogonal to the air flow direction, wherein the centrifugal blower further includes: first straightening vanes that correspond to outer cooling fins located at both ends among the cooling fins, and extend from downstream ends of the outer cooling fins toward the blow port; and a second straightening vane that corresponds to at least one of inner cooling fins located between the outer cooling fins, and extends from a downstream end of an inner cooling fin toward the blow port.
- According to the invention, when the impeller is rotated, blown air is sheared by the cooling fins, and blown air flows between the cooling fins. Subsequently, the blown air flows between the first straightening vanes and the second straightening vane, and is then blown out from the blow port.
- Between the first straightening vanes according to the invention, at least two passages separated by the second straightening vane are formed, and the blown air flows through each passage. Contrary to this, a centrifugal blower described in Japanese Patent Laid-Open No. 2000-145700 has a single passage between partitions.
- With such a difference, the invention achieves an increased straightening effect (a prevention effect of a turbulent flow) on a downstream side of the cooling fins, thus preventing amplification of high frequency sounds resulting from the turbulent flow that occurs on the downstream side of the cooling fins, compared to the blower described in Japanese Patent Laid-Open No. 2000-145700.
- Further, even if a turbulent flow including a Karman vortex occurs in one of the passages between the straightening vanes, the turbulent flow has no influence on the blown air passing through the other adjacent passage. In this respect, the invention also achieves reliable attenuation of noise.
- The foregoing and other objects, features and advantages of the invention will become more apparent from the following description and the accompanying drawings.
- FIG. 1 is a side sectional view of a centrifugal blower according to the invention;
- FIG. 2 is a sectional view in an arrow direction taken along the line A-A in FIG. 1;
- FIG. 3 is a sectional view in an arrow direction taken along the line B-B in FIG. 1;
- FIG. 4 is an enlarged sectional view of action of straightening vanes;
- FIG. 5 is a graph of states of noise generation according to presence and absence of the straightening vanes;
- FIG. 6 is a side sectional view of a conventional centrifugal blower; and
- FIG. 7 is an enlarged sectional view of a state of a turbulent flow of the conventional centrifugal blower having no straightening vane.
- FIGS. 1 to 5 show an embodiment of a centrifugal blower according to the invention. In this embodiment, a multivane blower (hereinafter referred to as a blower) having many forward curved vanes among centrifugal blowers will be described as an example. Parts having like configurations as in a conventional blower in FIGS. 6 and 7 will be described using like reference numerals.
- First, a whole structure of a
blower 10 will be described with reference to FIGS. 1 to 3. Theblower 10 has a scroll 1, and has animpeller 2 with many forward curvedvanes 2a therein. Asuction port 5 is formed on aside plate 1a of the scroll 1, and air is sucked into theimpeller 2 through thesuction port 5. Ablow port 3 is formed on a blow side of the scroll 1, and the air sucked into theimpeller 2 is guided along an inner peripheral surface of the scroll 1, and blown out from theblow port 3. Anelectric motor 6 is provided as a rotation drive source of theimpeller 2 as shown in FIGS. 2 and 3. A control device 7 (such as a transistor) of theelectric motor 6 is provided near theblow port 3 in the scroll 1. Sevencooling fins 4 of thetransistor 7 protrude inwardly of the scroll 1. Eachcooling fin 4 is made of an aluminum material, and extends along a flow direction of blown air flowing in the scroll 1. Thecooling fins 4 are provided side by side at intervals in a direction orthogonal to the flow direction of the blown air, allowing the blown air to flow between thecooling fins 4 adjacent to each other. - The above described configuration of the
blower 10 is similar to that of the conventional blower, and a feature of theblower 10 according to the invention resides in providingfirst straightening vanes 8a andsecond straightening vanes 8b between thecooling fins 4 and theblow port 3. - The
first straightening vanes 8a correspond toouter cooling fins 4a located at both ends among thecooling fins 4, and extend from downstream ends of the outer cooling fins 4a toward theblow port 3. Thesecond straightening vanes 8b correspond toinner cooling fins 4b located between the outer cooling fins 4a, and extend from downstream ends of theinner cooling fins 4b toward theblow port 3. The straighteningvanes straightening vanes cooling fins 4, and extend in the same direction as thecooling fins 4 as shown in FIG. 5 and FIG. 6. - A second straightening
vane 8b is arranged at every otherinner cooling fin 4b among fiveinner cooling fins 4b, and this allows the blown air having passed between thecooling fins 4 to be divided into three parts by thestraightening vanes blow port 3. - While the
electric motor 6 of theblower 10 according to the embodiment is driven, theimpeller 2 rotates, and the air is sucked into theimpeller 2 through thesuction port 5. Then, the sucked air is blown along the scroll 1 toward theblow port 3. Part of the air blown toward theblow port 3 passes between thecooling fins 4. The blown air having passed through the cooling fins 4 passes through passages divided into three parts, and guided to theblow port 3. - According to the embodiment, the blown air having passed through the
cooling fins 4 is divided by thestraightening vanes - The
straightening vanes cooling fins 4, and extend in the same direction as thecooling fins 4, thus there is no bump or flection between thecooling fins 4 and thestraightening vanes cooling fins 4 smoothly flows between the straighteningvanes - Now, noise attenuation action of the
blower 10 will be described with reference to FIG. 5, comparing the conventional blower having no straighteningvanes blower 10 according to the invention having thestraightening vanes blower 10 according to the embodiment. - Specifically, comparing the conventional blower with the
blower 10 according to the embodiment, noise is attenuated in most of bands from 500 Hz to 5 kHz in theblower 10, and especially, the amount of attenuation of high frequency sounds of 2 kHz and higher is extremely large. - The straightening
vanes blower 10 is produced. - The
straightening vane 8 is provided at everyother cooling fin 4 in this embodiment, but when thestraightening vanes cooling fins 4, a straightening effect of the blown air is further increased, and the noise is further attenuated.
Claims (6)
- A centrifugal blower comprising:a scroll (1) that accommodates an impeller (2); anda plurality of cooling fins (4) for cooling a control device that extend near a blow port (3) in the scroll (1) and along an air flow direction, and are provided side by side at intervals in a direction orthogonal to the air flow direction,wherein said centrifugal blower further comprises:first straightening vanes (8a) that correspond to outer cooling fins 4a located at both ends among said cooling fins (4), and extend from downstream ends of said outer cooling fins toward said blow port (3); and wherein said centrifugal blower in characterized by comprisinga second straightening vane (8b) in correspondence to at least one of the inner cooling fins (4b) located between said outer cooling fins (4a), and extends from a downstream end of said inner cooling fin toward said blow port (3).
- The centrifugal blower according to claim 1, wherein said second straightening vane (8b) is provided at every other inner cooling fin (4b) among said plurality of inner cooling fins (4b).
- The centrifugal blower according to claim 1, wherein said second straightening vane (8b) is provided at each of said plurality of inner cooling fins (4b).
- The centrifugal blower according to claim 2, wherein said first straightening vanes (8a) and said second straightening vane (8b) have the same height and width as said cooling fins (4), and extend in the same direction as said cooling fins (4).
- The centrifugal blower according to claim 3, wherein said first straightening vanes (8a) and said second straightening vane (8b) have the same height and width as said cooling fins (4), and extend in the same direction as said cooling fins (4).
- The centrifugal blower according to any one of claims 1 to 5, wherein said first straightening vane (8a) and said second straightening vane (8b) are integrally formed with said scroll (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002180245 | 2002-06-20 | ||
JP2002180245A JP2004019635A (en) | 2002-06-20 | 2002-06-20 | Centrifugal blower |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1375925A2 EP1375925A2 (en) | 2004-01-02 |
EP1375925A3 EP1375925A3 (en) | 2004-09-01 |
EP1375925B1 true EP1375925B1 (en) | 2006-11-29 |
Family
ID=29717513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03253621A Expired - Lifetime EP1375925B1 (en) | 2002-06-20 | 2003-06-09 | Centrifugal blower with cooling fin |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1375925B1 (en) |
JP (1) | JP2004019635A (en) |
DE (1) | DE60309973T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9109610B2 (en) | 2009-03-25 | 2015-08-18 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Radial blower |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005248878A (en) * | 2004-03-05 | 2005-09-15 | Toshiba Tec Corp | Electric blower and electric appliance |
JP4659389B2 (en) * | 2004-05-26 | 2011-03-30 | オリエンタルモーター株式会社 | Centrifugal blower |
US7469689B1 (en) * | 2004-09-09 | 2008-12-30 | Jones Daniel W | Fluid cooled supercharger |
JP4760410B2 (en) * | 2006-02-02 | 2011-08-31 | マックス株式会社 | Blower |
JP4760583B2 (en) * | 2006-07-14 | 2011-08-31 | マックス株式会社 | Blower |
JP4946352B2 (en) * | 2006-10-26 | 2012-06-06 | マックス株式会社 | Blower and air conditioner |
WO2009146484A1 (en) | 2008-06-05 | 2009-12-10 | Resmed Ltd | Treatment of respiratory conditions |
DE102008051559A1 (en) | 2008-10-14 | 2010-04-15 | Minebea Co., Ltd. | Radial fan for cooling electric motor, has housing part including base plate of electric motor and good heat conductive material, and control electronics that is heat-conductively connected with housing part |
DE102009018117B4 (en) | 2009-04-20 | 2016-02-25 | Minebea Co., Ltd. | Centrifugal fan with spiral housing |
EP2317150B1 (en) * | 2009-10-29 | 2019-12-18 | ResMed Pty Ltd | Patient ventilation device and components thereof |
JP5629505B2 (en) * | 2010-06-25 | 2014-11-19 | 山洋電気株式会社 | Centrifugal fan |
PL3193022T3 (en) * | 2016-01-13 | 2022-10-10 | Silverline Endüstri ve Ticaret A.S. | Centrifugal ventilating fan |
USD826277S1 (en) | 2017-03-07 | 2018-08-21 | Regal Beloit America, Inc. | Motor housing |
CN109707670B (en) * | 2018-12-29 | 2020-10-16 | 泛仕达机电股份有限公司 | Centrifugal volute tongue structure of making an uproar that falls |
CN110469540B (en) * | 2019-07-24 | 2020-10-20 | 南京航空航天大学 | Combined type vortex reducer structure and counter-rotating compressor system adopting same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2742813B1 (en) * | 1995-12-26 | 1998-02-13 | Valeo Climatisation | CENTRIFUGAL FAN, ESPECIALLY FOR MOTOR VEHICLE |
FR2746864B1 (en) * | 1996-03-26 | 1998-05-22 | Valeo Climatisation | CENTRIFUGAL FAN WITH INTEGRATED CONTROL MODULE, PARTICULARLY FOR MOTOR VEHICLE |
JP2000145700A (en) * | 1998-11-06 | 2000-05-26 | Denso Corp | Centrifugal blower |
DE19949321C1 (en) * | 1999-10-13 | 2001-05-03 | Temic Auto Electr Motors Gmbh | Cooling fan for automobile has electronic control circuit for fan motor contained in housing provided with cooling ribs projecting into path of cooling air provided by fan wheel |
-
2002
- 2002-06-20 JP JP2002180245A patent/JP2004019635A/en active Pending
-
2003
- 2003-06-09 DE DE60309973T patent/DE60309973T2/en not_active Expired - Lifetime
- 2003-06-09 EP EP03253621A patent/EP1375925B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9109610B2 (en) | 2009-03-25 | 2015-08-18 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Radial blower |
Also Published As
Publication number | Publication date |
---|---|
EP1375925A3 (en) | 2004-09-01 |
DE60309973D1 (en) | 2007-01-11 |
JP2004019635A (en) | 2004-01-22 |
DE60309973T2 (en) | 2007-09-20 |
EP1375925A2 (en) | 2004-01-02 |
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